ITB and intake temps

Magpie · Postby **Magpie** » Sat Aug 09, 2014 6:50 am

Both cars are in Brisbane. CFD is not cheap hence doing the aero without CFD. However, there is a lot of reading that can give you a good idea of what will and won't work.

Most of wish the we had the budget to commission Andrew to do an aero package like on Danny's.

Plus this is fun

Dupain · Postby **Dupain** » Sat Aug 09, 2014 7:35 am

Magpie wrote:Both cars are in Brisbane. CFD is not cheap hence doing the aero without CFD. However, there is a lot of reading that can give you a good idea of what will and won't work.

Most of wish the we had the budget to commission Andrew to do an aero package like on Danny's.

Plus this is fun

I've done pretty much to the 5 as what I've done before. Wish I had come across your projects earlier, really interested in this mod now. Need more $$ :lol:

Magpie · Postby **Magpie** » Sat Aug 09, 2014 8:10 am

There is about 6 MX5's in QLD with ITB's.

gslender · Postby **gslender** » Sat Aug 09, 2014 8:45 am

Magpie wrote:There is about 6 MX5's in QLD with ITB's.

ITBs are the new black!

Sent from my iPad using Tapatalk HD

Magpie · Postby **Magpie** » Sat Aug 09, 2014 8:48 am

Need to get them all in the one place for a photo

gslender · Postby **gslender** » Mon Aug 11, 2014 5:23 pm

Just pulled the trigger on one of these bad boys... http://www.jenvey.co.uk/home/accessories/airhorns-filters-and-boxes/jenvey-dynamics/airbox-75mm-inlet-right-top-abt2rt

The plan is to route cool air from the front of the radiator, over the top, and create a duct/shield that encloses the bonnet (probably using rubber window D seals) to give the mouth of the air box something to suck on (apparently it only likes cool / fresh air!)

sailaholic · Postby **sailaholic** » Mon Aug 11, 2014 6:57 pm

I was looking at that option if the civic radiator didn't work. Plohl already had the rad so I decided to go that way first.

Do you think there will be enough distance between the bonnet and the top of the radiator for a decent flow.

Thought about where the filter will go?

Magpie · Postby **Magpie** » Mon Aug 11, 2014 8:05 pm

Well G we know what will not fit

gslender · Postby **gslender** » Mon Aug 11, 2014 11:19 pm

sailaholic wrote:Do you think there will be enough distance between the bonnet and the top of the radiator for a decent flow.

Thought about where the filter will go?

As long as I make it wide enough, the cross sectional area will be similar as I'm only needing 3" diam equiv. So it looks fine.

Filter will be right in front, creating a box section behind the radiator, slightly angled down me thinks.

Sent from my iPad using Tapatalk HD

Dupain · Postby **Dupain** » Wed Aug 13, 2014 10:47 pm

Was at MX5 Mania today to pick up a relay.

Noticed in the clearance bin there was a carbon fibre ITB air box (2nd hand). Looked in good nick and well made. Should have taken a photo. Inlet @ 7cm. Probably go for $30.

Magpie · Postby **Magpie** » Sun Aug 17, 2014 12:18 pm

I played around with the first air box that I purchased for the ITB's and it is possible for it to fit!

Separate the filter, this allowed the locking nuts to be orientated to the top

However, with the PWR water/oil combo the filter box hits on the hoses, however it will fit. All that would be needed is to sikaflex the two parts back together. Although it still points towards the radiator ducting could still be made to get cool air from the hot side. Heat could be minimised by using something like this http://www.thermotec.com/products/14500-cool-air-tube-heat-shield.html

Magpie · Postby **Magpie** » Sun Aug 17, 2014 12:55 pm

From the recent track day with the NACA duct I have found that the average difference between the outside and under bonnet temps have decreased.

Jap Nats----------25.8 deg diff at start
Time Attack -----19.8

Jap Nats -------- 32.2 after about 5 mins
Time Attack------20.2

Jap Nats---------36.1 in the pits after cooldown lap
Time Attack-----26.8

project.r.racing · Postby **project.r.racing** » Sun Aug 17, 2014 1:11 pm

where is the sensor now you have the airbox in?

Magpie · Postby **Magpie** » Sun Aug 17, 2014 1:47 pm

The air box is not in, I'm still using the Pipercross dome filter. It will fit on a similar car if it does NOT have the same PWR radiator that is in mine.

The sensor for the ECU is located on the base plate that the air filter or box attaches to. The sensor that I have been using for data analysis is located on the outside of the dome filter.